Improvement in grates for steam-boilers



UNITED STATES PATENT OFFICE.

JAMES SANDERS, OF WAPPINGERS FALLS, NEW YORK, ASSIGNOR TO DIS- BROW ANDHALLIWELL, OF SAME PLACE.

IMPROVEMENT IN GRATES FOR STEAM-BOILERS.

Specification forming part of- Letters Patent No. 152,692, dated June30, 1874 application filed May 29, 1874.

To all whom it may concern Be it known that I, JAMES SANDERS, of

. Wa-ppingers Falls, in the county of Dutchess the grate-bars employedfor steam-boilers, and

consists of apeculiar construction of the bars, which is hereinafterpointed out and specifically claimed, whereby a free circulation of airis afforded and the liability of choking is avoided. 1

In the accompanying drawing, which forms part of this specification,Figure 1 represents a plan of a grate constructed in accordance with myinvention; Fig. 2, a longitudinal vertical section of the same and Fig.3, a transverse vertical section on the line a: m.

A A are the fire-bars of the grate, arranged side by side, and in one,two, or more longitudinal series, the one back of the other. Said barsare formed with end portions 1) c, and

preferably with intermediate portions d d, of a suitable width to keepthe bars at a proper distance apart for the passage of air up betweenthem, and are furthermore provided with lateral projections or wings ee, which, while serving to support the fuel, allow of the passage of airup in between them to promote combustion; and the more efi'ectual] y tosecure this latter result, said wings extend only for a portion of thedepth of each bar, and are beveled or taper ofI where they join the bodyof the bar, thus giving a large or free airspace in between the bars topromote combustion.

B, B, and G are crossbearers on which the bars are supported. Thebearers B B are made sloping or beveling downward in an inward directionon their upper edges, and the end portions b of the bars made similarlysloping on their under surfaces where they rest on said bars, wherebyincreased facility is afforded for contraction and expansion of the barsand clearance of cinder choking said ends of the bars. The other ends ofthe bars 0 are of hook form, to give the bars a lock or hold on theintermediate bar U, which is made double or hollow for the purpose, andsaid ends or portions of the bars constructed to form an upper cavity,f, for the further passage of cinder, and free admission of air to thefire.

hat I claim is l The combination, with the bars A, havinghooked ends 0for engaging with the intermediate bar 0, of the portions d for holdingthe bars at a suitable distance apart, the wings 0 extending only for aportion of the depth of the bars for the free passage of air, and thecavities f in the ends of the bars for the admission of air and passageof cinders, substantially as herein shown and described.

JAMES SANDERS.

Witnesses W. HENRY REESE, J OSEPH FAULKNER.

